Text Case Converter and Cleanup
Words: 0 · Characters: 0 · Lines: 0
Processed locally in your browser. Your input is not uploaded or saved by this tool.
Change case
Clean up text
Sentence case uses simple punctuation rules; names and acronyms are not detected. English title case keeps common short words lowercase except at the ends; Russian title case capitalizes every word. Duplicate removal is exact and case-sensitive. Spaces cleanup preserves line breaks. Sort order follows the page language, with natural numeric ordering.
Up to 100,000 UTF-16 code units. Undo keeps at most 20 transformations in memory. Manual edits clear transformation history; Reset clears all text and history.
How it works
Paste text and choose a case or cleanup action. Actions change the text in place, so you can combine them. Undo reverses transformations without retyping. Copy or download the final text as UTF-8. Cleanup normalizes line endings to LF; case conversion otherwise preserves spacing. Nothing is uploaded or saved, and reloading the page clears the workspace.
Example
Paste “ Hello WORLD ” and choose Remove extra spaces to get “Hello WORLD”. Then choose Sentence case to get “Hello world”. Undo restores the previous version.
Frequently asked questions
Does this support Russian and Unicode?
Yes. Case conversion supports Cyrillic and Unicode letters. Characters such as emoji are kept. Unicode case conversion can change character counts, for example German ß becomes SS in uppercase.
How do I remove repeated lines safely?
Remove duplicate lines keeps the first occurrence of each exact line. It treats uppercase and lowercase or different spacing as distinct. If wanted, trim or normalize spaces first; Undo can reverse each transformation.